What potential pitfalls should be considered when using PHP for form submissions?

One potential pitfall when using PHP for form submissions is the risk of SQL injection attacks if user input is not properly sanitized. To prevent this, always use prepared statements or parameterized queries when interacting with a database to avoid malicious SQL code injection. 

// Example of using prepared statements to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->execute(['username' => $_POST['username']]);
$user = $stmt->fetch();

Keywords

SQL injection cross-site scripting (XSS) form validation CSRF protection input sanitization

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